Improvement in wrench



latitud' ,Stairs n. M. THOMPSON, or'cosHocToNgo-Hro.

Letters Patent No, 96,287, dated October 26, 1869.

y,IM'PROVEMBN'J: IN WRENCH.

The Schedule referred to in these Letters Patent and making partof the same.

To all whomit may concern:

Be it known that I, R. M. THOMPSON, .of Coshocton, in the county of Coshocton, and State of Ohio, have invented new and useful Improvements iu Wrenches; and I do hereby declare that the f0llowing is a full, clear., and exact description of my invention, reference being had to the accompauyingdrawings, forming a part of this specification, and to` the ings- Figure l is a front view of my improved wrench.

Figure 2 is a side View of the same.

Figure 3 is a side view .of the wrench-standard.

Figures 4 are side view and plan of the grooved retaining-wedge. v

Figures 5 are side view and plan of movable jaw.

The nature of my invention consists in certain improvements in the'n'iechanical construction of a wrench with sliding jaw, as is hereinafter described, whereby I obtain a very simple and elijcient wrench, which may be put together by simply unit-ing the three castings composing the wrench, without the necessity of any finishing on 'said castings, and hence may be produced at a very moderate cost,lwhich vmakes it very useful for all purposes requiring an adjustable and cheap wrench, such as in agricultural machinery, harvesters, and other impleinents, in which a wrenchv is usually supplied to each machine.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construcvtion and operation.

The standard B has the head or jaw A secured at its top, and. has th'e grooves J and K formed in it, which grooves unite with each other, and are made through the standard B, in the direct-ion of the head A, as shown.

The corrugated face C is formed on the face of the standard B, under the head-A, as'shown, and the' lower end of the standard B, which may be cast with a slot, as "shown, or in a hollow cylindrical form, if preferred, forms the handle of the wrench, or it may be cast as a shank, and a wooden handle ailxed, if

' preferred.

The movable jaw D is made with the corrugated face E, and has a neck, L, of the saine thickness as the width of the slot J ,and a head, F, of the 'same dimensions, vertically and horizontally, as the slot K in the standard B, from which it is eviden-t that the'v jaw D is placed in position on the standard B, by passing the head F through the slot K, when the neck L can move up andA down in the slot J, as is readily seen.

letters of reference marked thereon, of which draw- The wedge G is made with a groove inthe centre, of the same width asthe groove J, and ,has its arms I I headed on the inside, as shown.

The thumb-rest H is secured at its rear end, by means of which it is readily slid up or'down by the thumb of the hand which grasps the Wrench-handle, anda guide-lug, N, is fixed on vits lower side, which moves in the -slot J, and thus secures the correct linear movement of the wedge.

The wedge is secured in position, and the uniting of the several parts of the Wrench is effected by bend-` ing the arms I I apart at their ends until they can pass the neck L of the jaw D, which projects through the standard B, when the Wedge is secured, and the several parts united by bending togetherthe arms I I,` the heads on the inner faces of which willprevent the wedge from being slid out from under the head F,

although a limited movement ofthe Wedge under said head may be effected.

The jaw D is secured in any desired position by pushing the Wedge G forward, which causes it to act as a wedge between the head F and thestandard B, and thusbinds the corrugated faces, C and E, of the .standard B and jaw D firmly together, which x'es the jaw on the standard.

' The operation of looseningI the jaw I), and varying the distance 'between it and the jaw A, is too evident, from the foregoing description, to Arequire further explanation.

The standard B and jaw D maybe made of any suitable material of sufficient strength, whether malloable or not; but the -Wedge G, or at least the arms I I of said wedge, should be of some malleable metal, so as to allow of their being bent, as before shown. .A

Having thus fullydescribed my invention,

lVhat I claim as new, and desire to secure by Letters Patent, is.- Y

The improved wrench herein described,consisting of the standard B, with jaw A, corrugated faceV C, and' slots J and K, movable jaw 1) witlrcorrugated face E, neck L, and head F, and 'tlieretainingfwedge G,` with headed malleable arms I I and thumb-piece H," the several parts being constructed andy combined vSubstantially as and for-the purpose specified.'`

A S evidence that I clainLt-he foregoingplI have' i i hereunto set my hand, inthe-presence .ofv'two wit-1YYY nesses, this 6th day of August, 1869.

' R. M. THOMPSON.'

W'it-nesses:

J. S. ELLIofrT, *JOSEPH ELLxoTT. 

